CLAMP is the best. Watch the vid:
http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=63753277
I use a torch usually.....
YOU MUST BURN OFF THE CHROME OF THE VISE GRIP CLAMPS ATLEAST 6 TIMES BEFORE INITIAL USE.OF COURSE, BUY A NEW ONE FROM HOME DEPOT, DONT USE AN OLD OILY...